Dijet production as a centrality trigger for p-p collisions at CERN LHC

Details Dijet production as a centrality trigger for p-p collisions at CERN LHC Dijet production as a centrality trigger for p-p collisions at CERN LHC

2003-11-18

arxiv.org/abs/hep-ph/0311231v2

Phys.Rev.D69:114010,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, Revtex 4, 14 EPS figures. Expanded discussion of some points, added 3 new figures and new references. Included comme

Scientific paper

10.1103/PhysRevD.69.114010

We demonstrate that a trigger on hard dijet production at small rapidities allows to establish a quantitative distinction between central and peripheral collisions in pbar-p and p-p collisions at Tevatron and LHC energies. Such a trigger strongly reduces the effective impact parameters as compared to minimum bias events. This happens because the transverse spatial distribution of hard partons (x >~ 10^{-2}) in the proton is considerably narrower than that of soft partons, whose collisions dominate the total cross section. In the central collisions selected by the trigger, most of the partons with x >~ 10^{-2} interact with a gluon field whose strength rapidly increases with energy. At LHC (and to some extent already at Tevatron) energies the strength of this interaction approaches the unitarity ('black-body') limit. This leads to specific modifications of the final state, such as a higher probability of multijet events at small rapidities, a strong increase of the transverse momenta and depletion of the longitudinal momenta at large rapidities, and the appearance of long-range correlations in rapidity between the forward/backward fragmentation regions. The same pattern is expected for events with production of new heavy particles (Higgs, SUSY). Studies of these phenomena would be feasible with the CMS-TOTEM detector setup, and would have considerable impact on the exploration of the physics of strong gluon fields in QCD, as well as the search for new particles at LHC.

Affiliated with

Also associated with

No associations

Rating

Dijet production as a centrality trigger for p-p collisions at CERN LHC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dijet production as a centrality trigger for p-p collisions at CERN LHC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dijet production as a centrality trigger for p-p collisions at CERN LHC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-191344